Baby Lock BLMY Service Manual
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Baby Lock BLMY Service Manual

Computerized sewing machine
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Summary of Contents for Baby Lock BLMY

  • Page 4 1. Outline of Mechanism ................1 - 1 Main Mechanisms ................1 - 2 Driveline ..................1 - 3 Positions of electronic components ..........1 - 4 Control system block diagram ............1 - 5 Operation of other electronic components ........1 - 6 Using the threader ................1 - 7 2.

  • Page 5: Table Of Contents

    PF-F SW assy. removal ........................2 - 20 Thread guide shutter removal ......................2 - 21 Tension releaser link removal ......................2 - 21 Plate assembly removal ........................2 - 21 Thread guide removal ........................2 - 22 Thread tension gear removal ......................2 - 22 AT pulse motor removal ........................2 - 22 Tension disk removal ........................2 - 22 Thread take up spring removal ......................2 - 23...
  • Page 6 Lever AB assy. removal ........................2 - 40 Lever AB assy. disassembly ......................2 - 41 Shaft bushing A removal .........................2 - 41 Thread guide plate removal ......................2 - 41 Hook release plate removal ......................2 - 41 Threader hook assy. disassembly .....................2 - 42 Presser foot lifter removal ........................2 - 42 Thread take-up assy.
  • Page 7 3. Assembly .....................3 - 1 Needle bar, presser mechanism / upper shaft mechanism .......3 - 2 Plate spring attachment ........................3 - 3 Wire assy. attachment (lifter assy.) ....................3 - 3 Needle-presser module attachment ....................3 - 4 Upper shaft pulley attachment ......................3 - 4 Pulley attachment ..........................3 - 5 Upper shaft assy.
  • Page 8 Main motor assembly attachment ....................3 - 26 Motor fan attachment ........................3 - 26 Base plate rubber attachment ......................3 - 27 Inlet assy. and base plate cover attachment ..................3 - 27 Knee lifter assembly attachment ......................3 - 27 Base plate attachment ........................3 - 27 Power supply unit F attachment .......................3 - 28 Wire assy.
  • Page 9 Release guide plate attachment ......................3 - 54 Release lever attachment ........................3 - 55 Lock nut attachment .........................3 - 55 Spring (for needle bar supporter assy.) attachment .................3 - 56 Spring guard attachment ........................3 - 56 Presser dial attachment ........................3 - 57 Zigzag adjusting nut attachment ......................3 - 58 Spring-Z attachment ........................3 - 58 Adjusting plate assy.
  • Page 10 4. Adjustment ..................4 - 1 Needle curvature ....................4 - 2 Tip damage to needle ..................4 - 3 Starting test mode ....................4 - 4 Timing belt tension adjustment ................4 - 6 Motor belt tension adjustment ................4 - 7 Needle bar rise adjustment ................4 - 8 Needle bar height adjustment ................4 - 9 Three point needle drop adjustment ..............4 - 10 Needle interference left/right adjustment ............4 - 11...
  • Page 11 Cannot sew pattern well ..................5 - 9 Cannot sew button holes well ................5 - 10 Stitch length and zigzag width cannot be done by manual adjustment ...5 - 11 Problems with vertical needle movement and reverse stitching ......5 - 12 Does not operate when the foot controller is used ..........5 - 13 Thread tensioning does not go well ..............5 - 14 Thread cutter does not work normally .............5 - 15...
  • Page 12 Outline of Mechanism Main Mechanisms ............ 1 - 2 Driveline ..............1 - 3 Positions of electronic components......1 - 4 Control system block diagram........1 - 5 Operation of other electronic components ....1 - 6 Using the threader............. 1 - 7 1 - 1...

  • Page 13: Main Mechanisms

    Outline of Mechanism Main Mechanisms Bobbin winder mechanism Thread guide mechanism Needle bar / Upper shaft Presser mechanism mechanism Side feed mechanism Rotary hook drive mechanism Thread cutting mechanism Feed / Rotary hook mechanism 1 - 2...

  • Page 14: Driveline

    Outline of Mechanism Driveline A) Up and down movement of needle bar, movement of thread take-up lever and zigzag mechanism Thread take-up Unit shaft Joint Upper shaft Pulley counter weight Needle bar crank Thread take-up lever Needle bar crank rod Needle bar block Needle bar Needle bar release lever...

  • Page 15: Positions Of Electronic Components

    Outline of Mechanism Positions of electronic components SW ASSY:BW-F Power supply unit,F PCB ASSY:SS-VR AT pulse motor PCB ASSY:NP SW ASSY:PF-F LCD module Z pulse motor (LCD panel) BH change PCB ASSY: switch assy MAIN BH switch PCB ASSY: lever OPERATION PCB UNIT: Power switch...

  • Page 16: Control System Block Diagram

    Outline of Mechanism Control system block diagram Power supply unit AC power Switching power supply Inlet supply PCB UNIT: Main motor drive circuit Main LED LAMP-FL motor Z pulse AT pulse F pulse C pulse S pulse LED (white) motor motor motor motor...

  • Page 17: Operation Of Other Electronic Components

    Outline of Mechanism Operation of other electronic components Start/Stop (SS) Switch ....Switch for starting and stopping the sewing machine. The machine operates at a slow speed while the switch is being held down.

  • Page 18: Using The Threader

    Outline of Mechanism Using the threader The threader provided on this sewing machine is a device for making threading easy, but there are cases where it cannot be used because of the combination of sewing machine thread and needle type. At present, there are various types of sewing machine thread and sewing machine needles on the market for handling a variety of sewing conditions.
  • Page 19 1 - 8...

  • Page 20: Disassembly

    Disassembly Main unit Main parts........2 - 2 Electrical parts and motors .... 2 - 11 Thread tension mechanism ... 2 - 18 Bobbin winder mechanism .... 2 - 24 Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy.
  • Page 21 Main unit Main parts location diagram 2 - 2...

  • Page 22: Main Unit Main Parts

    Main unit Main parts Accessory table removal 1. Remove the accessory table 1. 2. Remove the accessory table door 2 from the accessory table 1. Top cover removal 1. Remove top cover 1. *Key point • Push the attached part toward the inside and remove. Face plate removal and disassembly 1.
  • Page 23 Main unit Main parts Front thread guard cover removal 1. Remove the screw 1, and remove the front thread guard cover 1. Needle plate B removal and disassembly 1. Remove the needle plate cover 1. 2. Remove the needle plate B 2. 3.
  • Page 24 Main unit Main parts Front cover removal 1. Remove the screw 1 and the 3 screws 2. 2. Remove the hook 1 on the front cover, and then remove the hook 2 by pushing the hook attachment section 2 on the rear cover. *Key point •...
  • Page 25 Main unit Main parts Operation PCB assembly removal 1. Remove the connector 1 from the operation PCB 2, and then disconnect the FFC 3. *Key point • Pull up the lock of the connector on the operation PCB 2 to release it, and then disconnect the FFC 3.
  • Page 26 Main unit Main parts Indication panel removal 1. Remove the 4 hooks 1 from the backside of the front cover, and then remove the indication plate assembly 2. Front cover disassembly (bobbin winder guide assembly removal) 1. Remove the screw 1, and remove the bobbin winder guide assembly 1. Front cover disassembly (spool pin holder removal) 1.
  • Page 27 Main unit Main parts Front cover disassembly (SS-VR PCB assembly removal) 1. Remove the screw 1, and then remove the lamp holder supporter 1. 2. Remove the 4 screws 2, and then remove the insulation sheet 2 and the SS-VR PCB assembly 3. 3.
  • Page 28 Main unit Main parts Rear cover removal 1. Remove the screw 1. 2. Lower the presser lever 1, and then remove section 2, being careful to prevent the presser lever 1 being caught in section 2. 3. Remove section 4, being careful to prevent the switch 3 of the power supply unit being caught in section 4.
  • Page 29 Main unit Main parts Handle removal 1. Remove the 2 screws 1, and remove the handle 1. 2. Remove the 2 retaining rings E4 from the handle shafts, and remove the handle 1, the 2 handle shafts and the 2 polyester sliders from the handle holder.
  • Page 30 Main unit Electrical parts and motors location diagram 2 - 11...

  • Page 31: Electrical Parts And Motors

    Main unit Electrical parts and motors Power supply unit F removal 1. Unplug all of the connectors on the main PCB assy. 1. 2. Remove the main motor connector 2. 3. Disconnect the connector 3 of the inlet assembly lead wire. 4.
  • Page 32 Main unit Electrical parts and motors PCB Unit LED lamp FL removal 1. Disconnect the bands on the back of the arm bed (3 locations). 2. Remove the screw 1, and remove the PCB unit LED lamp FL 1. Base plate sub assy. removal 1.
  • Page 33 Main unit Electrical parts and motors Base rubber removal 1. Remove the 4 base rubbers A 1. 2. Remove the adjusting screw assembly 2. Timing belt (motor belt) removal 1. Remove the timing belt 1. Motor fan removal 1. Remove the motor fan 1. NOTE •Be careful not to bend the fins of the motor fan 1.
  • Page 34 Main unit Electrical parts and motors Main motor assembly disassembly 1. Remove the 2 screws 1, and remove the main motor assembly 1 and the motor spacer presser 2. 2. Remove the fender rubber 3 from the motor holder 4. 3.
  • Page 35 Main unit Electrical parts and motors Side feed mechanism disassembly 1. Remove screw 1 and screw 2, and remove plate spring B 1, the side feed adjust plate 2, washer, side feed arm assy. 3 and plate spring A 4. 2.
  • Page 36 Main unit Electrical parts and motors Main PCB assy. removal 1. Remove the screw 1 and the 2 screws 2, and remove the main PCB assy. NP PCB assy. removal 2, 3 1. Remove the 3 screws 1, and remove the PCB holder 1. 2.
  • Page 37 Main unit Thread tension mechanism location diagram 2 - 18...

  • Page 38: Thread Tension Mechanism

    Main unit Thread tension mechanism Thread tension assy removal 1. Remove the spring 2. Remove the 2 screws 1, and remove the thread tension assy 1. Thread guide removal 1. Remove the 2 screws 1, and remove the thread guide assy. 1. 2.

  • Page 39: Pf-F Sw Assy. Removal

    Main unit Thread tension mechanism Thread guide cover removal 1. Remove the thread guide cover 1. *Key point • Lift the protrusion 2 and slide to the right. Retaining ring E2 Tension plate removal 1. Remove retaining ring E2, and remove the spring 2.

  • Page 40: Thread Guide Shutter Removal

    Main unit Thread tension mechanism Thread guide shutter removal 1. Remove the spring 2. Remove retaining ring E3, and remove the thread guide shutter 1 and the thread guide shutter link 2. Retaining ring E3 Tension releaser link removal 1. Remove the retaining ring E3 and remove the tension releaser link 1. Retaining ring E3 Plate assembly removal 1.

  • Page 41: Thread Guide Removal

    Main unit Thread tension mechanism Thread guide removal 1. Remove the 2 screws 1, and remove the thread guide 1. Thread tension gear removal Retaining ring E3 1. Remove the retaining ring E3 and remove the thread tension gear 1, thread tension gear cover 2 and the spring 3.

  • Page 42: Thread Take Up Spring Removal

    Main unit Thread tension mechanism Thread take up spring removal 1. Remove the screw 1, and remove the thread catching spring case 1. 2. Remove the from the thread catching spring case 1. Thread guide wire removal 1. Remove the screw 1, and remove the thread guide wire 1 and the washer 2 - 23...

  • Page 43: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism location diagram 2 - 24...

  • Page 44: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder cover removal 1. Remove the bobbin base 1. 2. Remove the screw 1, and remove the bobbin winder cover 2. Bobbin base disassembly 1. Remove the bobbin thread cutter holder 1. 2. Remove the 2 NT lower thread cutters 2. Bobbin presser removal 1.

  • Page 45: Bw Holder Supporter Removal

    Main unit Bobbin winder mechanism BW holder supporter removal 1. Remove the screw 1, and remove the BW holder supporter 1. BW-F SW assy. removal 1. Remove the BW-F SW assy 1. *Key point • Open the SW adjust plate 2 clip and remove it. BW shaft holder assembly removal 1.
  • Page 46 Main unit Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy. location diagram 2 - 27...

  • Page 47: Rotary Hook Drive Mechanism

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism / Cutter assy. location diagram Leading guide removal 1. Remove the screw 1, and then remove the leading guide 1. Thread cutter module removal 1. Remove the 2 screws 1, and then remove the free arm plate 1. 2.

  • Page 48: Lower Shaft A Assy. Removal

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism / Cutter assy. location diagram Lower shaft A assy. removal 1. Remove the 2 screws 1, and remove the 2 bushing pressers 1. 2. Remove the lower shaft A assy 2. Joint removal 1.

  • Page 49: Needle Bar, Presser Mechanism

    Main unit Needle bar, presser mechanism / Upper shaft mechanism location diagram 2 - 30...

  • Page 50: Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Upper shaft removal 1(x 2), 2(x 2) 1. Remove the 2 screws 1 and the 2 screws 2, and slide the fixed joint 1 to the right. 2. Remove the screw 3, and detach the bushing presser 2. 3.

  • Page 51: Needle-Presser Module Removal

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Needle-presser module removal 1. Remove the screw 1. 2. Remove the 4 screws 2, and detach the presser plate A 1 and the presser plate B 2. 3. Remove the needle-presser module. 4.

  • Page 52: Plate Spring Removal

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Plate spring removal *Rear view 1. Remove the adjusting screw 1. 2. Remove the 2 screws 1, and remove the plate spring 2. *Front view 2 - 33...

  • Page 53: Needle-Presser Module

    Modules Needle-presser module breakout diagram 2 - 34...

  • Page 54: Modules Needle-Presser Module

    Modules Needle-presser module BH switch assy. removal 1. Remove the screw 1, and detach the BH switch assy 1. Presser feed holder assy. removal 1. Remove the screw 1, and detach the presser feed holder assy 1. Adjusting plate assy. removal 1.

  • Page 55: Spring-Z Removal

    Modules Needle-presser module Spring-Z removal 1. Remove the spring Zigzag adjusting nut removal 1. Remove the screw 1, and remove the zigzag adjusting nut 1. Presser dial removal Retaining ring E4 1. Remove the screw 1, and remove the spring plate 1. 2.

  • Page 56: Spring Guard Removal

    Modules Needle-presser module Spring guard removal 1. Remove the screw 1, and remove the spring guard 1. Spring / needle bar hook stand spring removal 1. Remove Lock nut removal 1. Remove the lock nut 1 and the screw 1. 2 - 37...

  • Page 57: Release Lever Removal

    Modules Needle-presser module Release lever removal 1. Remove 2. Remove screw 1, and remove the release lever 1, release lever shaft 2 and polyester slider. 3. Remove screws 2 (two), and remove the release adjuster 3 from the release lever. 4.

  • Page 58: Needle Bar Assy. Removal

    Modules Needle-presser module Needle bar assy. removal 1. Remove screws 1 (two). 2. Remove the needle bar 1 needle thread block 2, needle bar hook stand assy. 3, thrust washer and Needle bar assy. disassembly 1. Remove the screw 1. 2.

  • Page 59: Lever A Spring Removal

    Modules Needle-presser module Lever A spring removal 1. Remove the spring Needle bar supporter assy. removal 1. Remove the screw 1, and remove the plate 1. 2. Remove the screw 2, and remove the shaft 2. 3. Remove the shaft 3. 4.

  • Page 60: Lever Ab Assy. Disassembly

    Modules Needle-presser module Lever AB assy. disassembly 1. Remove retaining ring E3, and remove the lever B 2 and the spring from the lever A assy. 1. 2. Remove the cap 3 from the lever B 2. Retaining ring E3 Shaft bushing A removal 1.

  • Page 61: Threader Hook Assy. Disassembly

    Modules Needle-presser module Threader hook assy. disassembly 1. Remove the thread guide assy, threader hook assy, link A assy, and link B. Presser foot lifter removal Retaining ring E4 1. Remove the retaining ring E4. 2. Lift up the presser bar clamp 1, and then remove the lifter assembly 2 and the lifter 3, and then remove the washer 4.

  • Page 62: Thread Take-Up Assy. Removal

    Modules Needle-presser module Thread take-up assy. removal 1. Remove the screw 1, and detach the thread take-up lever assy 1. NOTE •The screw 1 is reverse threaded. 2. Remove the 2 screws 2, and detach the needle bar crank rod assy 2. Thread take-up counter weight removal 1.

  • Page 63: Remove The Z Zigzag Cam

    Modules Needle-presser module Remove the Z zigzag cam Retaining ring E2 1. Remove the retaining ring E2, and remove the Z zigzag cam 1. Z pulse motor removal 1. Remove the screw 1, and detach the Z pulse motor (ZPMSMJ35-4840-A) 1. Thread release lever assy.

  • Page 64: T Cam Removal

    Modules Needle-presser module T cam removal 1. Remove the T cam 1. Presser bar removal 1. Remove the screw 1 from the presser bar clamp assembly 1, and then pull the presser bar downward. 2. Remove the presser bar clamp assembly 1 and spring 3.

  • Page 65: Thread Take-Up Lever Link Removal

    Modules Needle-presser module Thread take-up lever link removal 1. Remove the screw 1. 2. Remove the retaining ring E4, and remove the shaft 1, spring thread take-up lever link 2. Retaining ring E4 Shaft bushing assembly removal 1. Remove the 2 screws 1, and remove the shaft bushing assembly 1. 2 - 46...

  • Page 66: Feed And Bobbin Module

    Modules Feed and bobbin module breakout diagram 2 - 47...

  • Page 67: Feed And Bobbin Module

    Modules Feed and bobbin module Needle plate A removal 1. Remove the 2 screws 1, and remove the needle plate A 1. Needle plate A disassembly 1. Remove the screw 1, and then remove the F gear stopper plate 1. 2.

  • Page 68: F Pulse Motor Assembly Removal

    Modules Feed and bobbin module F pulse motor assembly removal 1. Remove the screw 1 and the screw 2, and detach the spring and the F pulse motor assembly 1. F pulse motor disassembly 1. Remove the 2 screws 1, and remove the F pulse motor (FPMSMJ35- 4840-C) 1.

  • Page 69: Feed Bar Spring Removal

    Modules Feed and bobbin module Feed bar spring removal 1. Remove the spring Feed bar removal 1. Remove the 2 screws 1, and remove the 2 feed bar shaft A 1. 2. Remove the feed bar 2. Vertical adjusting screw removal 1.

  • Page 70: Lower Shaft B Assy. Removal

    Modules Feed and bobbin module Lower shaft B assy. removal 1. Remove the 2 screws 1, and remove the joint 1. 2. Remove the 2 screws 2, and remove the bushing presser A 2. 3. Remove the lower shaft B assy 3. 4.

  • Page 71: Shaft Stopper Plate Removal

    Modules Feed and bobbin module Shaft stopper plate removal 1. Remove the screw 1, and then remove the shaft stopper plate 1. Set screw collar removal 1. Remove the screw 1, and then remove the set screw collar 1. Feed arm assembly removal Retaining ring E5 1.

  • Page 72: Feed Arm Assy. Disassembly

    Modules Feed and bobbin module Feed arm assy. disassembly 1. Remove the retaining ring E3, and remove the feed arm B assy 1 and the polyester slider. 2. Remove the retaining ring E2, and remove the feed supporting plate assy 2 from the feed arm B assy 1.

  • Page 73: Feed Adjuster Assembly Removal

    Modules Feed and bobbin module Feed adjuster assembly removal 1. Remove the 2 screws 1, and remove the bushing supporter assy 1, feed adjuster assembly 2, spring and polyester slider. Feed adjuster assembly disassembly 1. Remove the spring , and detach the F gear 1. Bushing presser B removal 1.

  • Page 74: Drop Assy. Removal

    Modules Feed and bobbin module Drop assy. removal 1. Remove the 2 screws 1, and remove the drop assy. 1. Retaining Drop assy. disassembly ring E3 1. Remove the screw 1. 2. Remove the retaining ring E3, and remove the vertical feed shaft 1, polyester slider, set screw collar 4 2 and spring 3.

  • Page 75: Thread Cutter Module

    Modules Thread cutter module breakout diagram 2 - 56...

  • Page 76: Thread Cutter Module

    Modules Thread cutter module Thread cutter frame assembly removal 1. Remove the 2 screws 1, and then remove the thread cutter frame assembly 1, 2 collars 2, and polyester slider 3. 2. Remove the wave-shape spring washer 4. Photo transistor assembly removal 1.

  • Page 77: Cutter Holder Assembly Removal

    Modules Thread cutter module Cutter holder assembly removal 1. Remove the cutter holder assembly 1. 2. Remove the NT lower thread cutter 2 from the cutter holder assembly 1. Thread hook assy. disassembly 1. Remove the retaining ring E4, and remove the polyester slider 1, polyester slider 2 and the thread hook assy 3.

  • Page 78: Thread Cutter Lever Assy. Removal

    Modules Thread cutter module Thread cutter lever assy. removal 1. Remove the thread cutter lever assy 1. Thread cutter lever assy. disassembly 1. Remove the screw 1, and remove the thread cutter lever gear 1. Idle gear A and idle gear B removal Retaining ring E2 1.
  • Page 79 2 - 60...

  • Page 80: Assembly

    Assembly When disassembly and assembly are performed, make adjustments according to "4 Adjustments." Main unit Needle bar, presser mechanism / upper shaft mechanism ....3 - 2 Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy........3 - 7 Bobbin winder mechanism ....

  • Page 81: Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism location diagram 3 - 2...

  • Page 82: Main Unit Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism Plate spring attachment *Front view 1. Attach the plate spring 1 from the front of the arm bed using the 2 screws 2. Attach the plate spring 1 from the back of the arm bed using the adjusting screw 2.

  • Page 83: Needle-Presser Module Attachment

    Main unit Needle bar, presser mechanism / upper shaft mechanism Needle-presser module attachment 1. Attach the retaining ring E5 to the shaft 1. 2. Insert the shaft 1 into the shaft hole on the left side of the needle presser module 2.

  • Page 84: Pulley Attachment

    Main unit Needle bar, presser mechanism / upper shaft mechanism Pulley attachment 1. Attach the pulley 1 to the upper shaft assy. *Key point • When the D cut 2 on the upper shaft is facing forward, the pulley base line 3 is on the upper side. forword Upper shaft assy.

  • Page 85: Connecting The Needle-Presser Module And Upper Shaft

    Main unit Needle bar, presser mechanism / upper shaft mechanism Connecting the needle-presser module and upper shaft 1. Face the unit shaft D cut 1 and the upper shaft D cut 2 forward. 2. Screw the 2 screws 1 into the fixed joint 3. *Key point •...

  • Page 86: Rotary Hook Drive Mechanism / Feed And Bobbin Mechanism /Cutter Assy

    Main unit Rotary hook drive mechanism / Feed and bobbin mechanism /Cutter assy. location diagram 3 - 7...

  • Page 87: Assembling The Lower Shaft A Assembly

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism /Cutter assy. Assembling the Lower shaft A assembly Retaining ring E6 1. Attach the retaining ring E6 to the lower shaft A 1. 2. Attach the thrust washer 2, lower shaft bushing 3, thrust washer 2 and set screw collar 4 (Face the ground surface toward the lower shaft bushing).

  • Page 88: Lower Shaft A Attachment

    Main unit Rotary hook drive mechanism / Feed and bobbin Lower shaft Lower shaft A attachment pulley base line 1. Rotate the lower shaft, and bring the needle bar to its highest point 1 (lower shaft pulley base line forward). 2.

  • Page 89: Thread Cutter Module Attachment

    Main unit Rotary hook drive mechanism / Feed and bobbin Thread cutter module attachment *Bottom view 1. Attach the thread cutting module 1 with the screws 1 and 2. 2. Attach the free arm plate 2 with the 2 screws 3. Torque Screw, Bind M4X5...

  • Page 90: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism location diagram 3 - 11...

  • Page 91: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder shaft stopper (bobbin winder assembly holder) assembly 1. Attach the bobbin winder shaft stopper 1 and SW adjust plate 2 to the bobbin winder assembly holder 3, and hand start the 2 screws 1. (Fully tighten after 3 - 13 "5 Bobbin winder holder assembly attachment.") Torque Taptite, Bind B...

  • Page 92: Bw Holder Supporter Attachment

    Main unit Bobbin winder mechanism BW holder supporter attachment 1. Attach the BW holder supporter 1 using the screw 1. Torque Taptite, Bind S M4X10 1.18 – 1.57 N·m Bobbin winder holder assembly attachment 1. Attach the bobbin winder assembly 1 using the screw 1. 2.

  • Page 93: Bobbin Winder Cover Attachment

    Main unit Bobbin winder mechanism Bobbin winder cover attachment 1. Attach the bobbin winder cover 1 using the screw 1. Torque Screw, Bind M3X6 0.78 – 1.18 N·m Bobbin base assembly 1. Attach the 2 NT lower thread cutters 1 and the bobbin thread cutter holder 2 to the bobbin base 3.

  • Page 94: Thread Tension Mechanism

    Main unit Thread tension mechanism location diagram 3 - 15...

  • Page 95: Thread Tension Mechanism

    Main unit Thread tension mechanism Spring tape attachment 1. Attach the spring tape 1 to the thread guard assembly 2. 0 – 0.5 *Key point • See the figure to the right for positioning. Thread guide wire attachment 1. Attach the thread guide wire 1 and the washer 2 using the screw 1. *Key point •...

  • Page 96: Thread Take Up Spring Attachment

    Main unit Thread tension mechanism Thread take up spring attachment 1. Attach the to the thread catching spring case 1. *Key point • Insert the end 2 of into spring tensile position hole (second from bottom). 3 between the protrusions on the •...

  • Page 97: Tension Disk Attachment

    Main unit Thread tension mechanism Tension disk attachment 1. Attach the tension disc A 1, tension disc B 2, washer 3, thread tension plate A 4, the tension disc washer 5, washer 3, spring and tension adjusting screw 6 to the thread tension disk shaft. 2.

  • Page 98: Thread Tension Gear Attachment

    Main unit Thread tension mechanism Thread tension gear attachment 1. Attach the thread tension gear 1, spring 2 and thread tension gear cover 3 and attach the retaining washer E3. *Key point • Attach the spring 2 to the small holes 4 in the thread tension gear 1 and the thread tension gear cover 3.

  • Page 99: Tension Releaser Link Attachment

    Main unit Thread tension mechanism Tension releaser link attachment 1. Attach the tension releaser link 1 to the thread release holder assy 2, and the attach retaining ring E3. Retaining ring E3 Thread guide shutter assembly 1. Attach the thread guide shutter 1 to the tension release holder assy. 2.

  • Page 100: Thread Release Holder Assy. Attachment

    Main unit Thread tension mechanism Thread release holder assy. attachment 1. Attach the tension release holder assy 1 to the thread guard assembly using the 2 screws 1. Torque Screw, Bind M3X4 0.78 – 1.18 N·m Retaining ring Tension plate attachment 1.

  • Page 101: Thread Guide Cover Assembly

    Main unit Thread tension mechanism Thread guide cover assembly 1. Attach the thread guide cover 1 to the thread guide assy 2 using the screw 1. 2. Attach the thread guide cover assembly 3 to the thread guard assembly 4 using the 2 screws 2.

  • Page 102: Electrical Parts And Motors

    Main unit Electrical parts and motors location diagram 3 - 23...

  • Page 103: Electrical Parts And Motors

    Main unit Electrical parts and motors NP PCB assy. attachment 2, 3 1. Attach the PCB holder 1 to the arm bed using the 3 screws 1. 2. Attach NP PCB assy 2 and the insulation sheet 3 to the PCB holder 1 using the 2 screws 2.

  • Page 104: Side Feed Mechanism Assembly

    Main unit Electrical parts and motors Side feed mechanism assembly 1. Attach the S pulse motor 1 using screws 1 (two). 2. Attach the side feed gear 2 to the side feed plate 3, and attach 3. Attach the side feed plate and side feed spacer 4 to the SPM holder, and attach retaining ring E3.

  • Page 105: Side Feed Mechanism Attachment

    Main unit Electrical parts and motors Side feed mechanism attachment 1. Attach the side feed unit 1 and wire clip using 2 screws 1. 2. Attach the side feed adjust plate 2 to the feed module feed bar using 2 screws 2.

  • Page 106: Base Plate Rubber Attachment

    Main unit Electrical parts and motors Base plate rubber attachment 1. Attach the 4 base plate rubbers 1 to the base plate. 2. Attach the adjusting screw assembly 2. Inlet assy. and base plate cover attachment 1. Attach the inlet assy 1 to the base plate using the screws the screw 1. 2.

  • Page 107: Power Supply Unit F Attachment

    Main unit Electrical parts and motors Power supply unit F attachment 1. Attach the power supply unit 1 to the arm bed with the 3 screws 1. 2. Connect the inlet assembly lead wirefs connector 2 to the power supply unit.

  • Page 108: Lead Assembly (Bh-Cable-F) Attachment

    Main unit Electrical parts and motors Lead assembly (BH-cable-F) attachment 1. Attach the lead assembly (BH-cable-F) 1 to the connector on the BH switch assembly 2. 2. Refer to Chapter 6 [Special Instructions of Wiring] for cord treatment of each section. 3 - 29...

  • Page 109: Main Parts

    Main unit Main parts location diagram 3 - 30...

  • Page 110: Main Parts

    Main unit Main parts Handle assembly and attachment 1. Attach the handle, handle holder and polyester slider to the handle shafts, Retaining ring E4 and attach 2 retaining rings E4. 2. Attach the handle to the arm bed using the 2 screws 1. Torque Taptite, Bind S M4X10...

  • Page 111: Rear Cover Attachment

    Main unit Main parts Rear cover attachment 1. Lower the presser lever 1. 2. Attach the rear cover, being careful to avoid the presser dial 3 being caught in section 2. 3. Attach the rear cover, being careful to avoid the switch 5 being caught in section 4, and then attach the hook 6 to the base plate.

  • Page 112: Front Cover Assembly (Sv Keytop Attachment)

    Main unit Main parts Front cover assembly (SV keytop attachment) 1. Attach the SV joint plate 1 to the speed control key part of the front cover. 2. Attach the SV keytop 2 to the SV joint plate 1. Front cover assembly (SS-VR F PCB assy. attachment) 1.

  • Page 113: Front Cover Assembly (Spool Pin Attachment)

    Main unit Main parts Front cover assembly (spool pin attachment) 1. Attach the spool pin 1 to the spool pin holder assembly 2. 2. Attach the thread bobbin cover 3 and the spool pin holder assembly 2 with the screws 1 and 2. *Key point •...

  • Page 114: Operation Pcb Holder Assembly Attachment

    Main unit Main parts Operation PCB holder assembly attachment 1. Attach the single light guide assembly 1 and the 2 spacers 2 to the operation PCB holder 3 with the 2 screws 1. *Key point • Check that the lead wire of the single light guide assembly 1 passes upper the right groove 4 of the operation PCB holder 2.

  • Page 115: Operation Pcb Assembly Attachment

    Main unit Main parts Operation PCB assembly attachment 1. Connect the connector 1 on the operation PCB assembly 2. *Key point • Check that the lead wire of the connector 1 passes under the left upper guide 3 of the operation PCB holder 4. 2.

  • Page 116: Front Cover Attachment

    Main unit Main parts Front cover attachment 1. Connect the FFC 1 and the lead wire connector to the main PCB 2. *Key point • Insert the FFC 1 with the blue surface facing up. 2. Engage the 2 hooks 3 with the bottom plate and 2 hooks 4 with the rear cover, and then secure the front cover with the 3 screws 1.

  • Page 117: Free Arm Cover Attachment

    Main unit Main parts Free arm cover attachment 1. Attach the free arm cover 1 to the arm bed with the screw 1. Torque Screw, Pan (S/P washer) M4X8 0.78 – 1.18 N·m Front thread guide cover attachment 1. Attach the front thread guide cover 1 using the screw 1. Torque Screw, Bind M3X4...

  • Page 118: Face Plate Assembly

    Main unit Main parts Face plate assembly 1. Attach the needle thread lever shaft 1, needle thread lever 2, and rubber washer 3 to the face plate. 2. Attach the shaft presser plate 4 to the face plate with the screw 1. 3.

  • Page 119: Accessory Table Assembly And Attachment

    Main unit Main parts Accessory table assembly and attachment 1. Attach the accessory table door to the accessory table 1. 2. Attach the accessory table 1 to the main unit. 3 - 40...

  • Page 120: Needle-Presser Module

    Modules Needle-presser module breakout diagram 3 - 41...

  • Page 121: Shaft Bushing Assembly Attachment

    Modules Needle-presser module Shaft bushing assembly attachment 1. Using the 2 screws 1, attach the shaft bushing assembly 1 to the upper unit holder. Torque Screw, Pan (S/P washer) M4X14DB 1.18 – 1.57 N·m Thread take-up lever link assembly 1. Apply a small amount of MOLYKOTE EM30L to the shaft hole in the thread take-up lever link.

  • Page 122: Presser Bar Attachment

    Modules Needle-presser module Presser bar attachment 1. Insert the presser bar bushing 1 into the shaft hole on the bottom of the unit holder. 2. Attach the plate spring 2 to the unit holder with the screw 1. *Key point •...

  • Page 123: Modules Needle-Presser Module

    Modules Needle-presser module Shaft attachment 1. Attach the shaft 1. Thread release lever assy. attachment 1. Apply a small amount of MOLYKOTE EM30L to the thread release lever assy hole 1 in the upper unit holder. 2. Attach the thread release lever assy 2 and polyester slider to the upper unit holder, and attach retaining ring E3.

  • Page 124: Z Pulse Motor Attachment

    Modules Needle-presser module Z pulse motor attachment 1. Attach the Z pulse motor (ZPMSMJ-35-4840-A) 1 to the upper unit holder using the screw 1. *Key point • Align the match mark 2 on the Z pulse motor gear and the match mark 3 on the T cam gear.

  • Page 125: Z Zigzag Lever Assy. Attachment

    Modules Needle-presser module Z zigzag lever assy. attachment 1. Attach the cap 2 to the Z zigzag lever assy 1. 2. Apply a small amount of MOLYKOTE EM30L to the 2 Z zigzag lever assy 1 pins. 3. Attach the Z zigzag lever assy 1 to the upper unit holder, and the attach retaining ring E3.

  • Page 126: Thread Take-Up Lever Assy. Attachment

    Modules Needle-presser module Thread take-up lever assy. attachment 1. Apply a bead of MOLYKOTE EM30L to the 2 calking shafts of the needle bar crank 1. 2. Apply a bead of MOLYKOTE EM30L to the calking shaft of the thread take-up lever assembly 2.

  • Page 127: Presser Foot Lifter Attachment

    Modules Needle-presser module Presser foot lifter attachment Retaining ring E4 1. Attach the retaining ring E4 to the presser lift shaft 1. 2. Apply a small amount of MOLYKOTE EM30L to the presser lift shaft 1. 3. Insert the presser lift shaft 1 into the hole 2 in the thread releaser assembly.

  • Page 128: Threader Hook Assy. Attachment

    Modules Needle-presser module Threader hook assy. attachment 1. Assemble the threader hook assy 1, link A assy 2, link B 3 and thread guide assy 4. 2. Align the needle thread shaft A 5 to the shape of the threader hook assy 1 shaft hole, and attach the threader hook assy 1 to the needle thread shaft A 5.

  • Page 129: Thread Guide Plate Attachment

    Modules Needle-presser module Thread guide plate attachment 1. Attach the thread guide plate 1 to the upper unit holder. Shaft bushing A attachment 1. Attach the shaft bushing A 1 to the upper unit holder using the screw 1. Torque Taptite, Bind B M3X8 0.78 –...

  • Page 130: Lever Ab Assy. Attachment

    Modules Needle-presser module Lever AB assy. attachment Retaining ring E2 1. Attach the retaining ring E2 to the lever guide shaft 1. 2. Apply a small amount of EPNOC AP(N)0 to the lever guide shaft 1. 3. Apply a small amount of MOLYKOTE EM30L to the upper unit holder slide groove.

  • Page 131: Lever A Spring Attachment

    Modules Needle-presser module Lever A spring attachment 1. Attach the spring to the lever AB assy 1 and the plate 2. 30.1 SPRING XC2461*** A decided hook form is the same. Shaft assy. attachment 1. Attach the upper unit support plate 1. 2.

  • Page 132: Needle Bar Assembly

    Modules Needle-presser module Needle bar assembly 1. Attach the needle thread plate 1 to the needle block 2. 2. Attach the needle bar thread guide 3, the needle block 2 and the needle thread guide spring 4 to the needle bar with the screw 1. 3.

  • Page 133: Needle Bar Assembly Attachment

    Modules Needle-presser module Needle bar assembly attachment 1. Apply a small amount of Epnoc Grease AP to the needle thread block 1. 2. Attach the needle bar 2, needle thread block 1, needle bar hook stand assy. 3, thrust washer and, hand start screws 1 (two).

  • Page 134: Release Lever Attachment

    Modules Needle-presser module Release lever attachment 1. Attach retaining washer E2 to the release lever shaft. 2. Attach the release adjuster 1 to the release lever 2, and hand start screws 1 (two). (Fully tighten following 4 - 25 "Release adjustment.") 3.

  • Page 135: Spring (For Needle Bar Supporter Assy.) Attachment

    Modules Needle-presser module Spring (for needle bar supporter assy.) attachment 1. Attach to the needle bar supporter assy. plate 1 and the upper unit holder. *Key point • Connect the side with the short hook to the needle bar supporter assy. plate 1 and the long side to the upper unit holder.

  • Page 136: Presser Dial Attachment

    Modules Needle-presser module Presser dial attachment 1. Attach the presser dial shaft assy 1 to the presser dial 2, and attach the retaining ring E4. *Key point • See the figure to the right for the presser dial shaft assy 1 D cut 3 and presser dial 2 hole 3.

  • Page 137: Zigzag Adjusting Nut Attachment

    Modules Needle-presser module Zigzag adjusting nut attachment 1. Apply a small amount of EPNOC AP(N)0 to the zigzag adjusting nut 1. 2. Hand tighten the zigzag adjusting nut 1 on the needle bar supporter assy using the screw 1. (Fully tighten after 4 - 10 "Three point needle drop adjustment.") *Key point •...

  • Page 138: Adjusting Plate Assy. Attachment

    Modules Needle-presser module Adjusting plate assy. attachment 1. Attach the adjusting plate assy 1 to the upper unit holder using the 2 screws 1. *Key point • Hold the adjusting plate assy 1 against the right stopper 2 and attach. •...

  • Page 139: Feed Module

    Modules Feed module breakout diagram 3 - 60...

  • Page 140: Feed Module

    Modules Feed module Drop knob attachment 1. Attach the 2 retaining rings E2 to the 2 slide shafts B 1. 2. Attach the drop knob 2 and to the 2 slide shaft B assembly 1 to the feed base 3, and the 2 attach retaining rings E2. 3.

  • Page 141: Drop Assy. Attachment

    Modules Feed module Drop assy. attachment 1. Attach the drop assy 1 using the 2 screws 1. Torque Screw, Bind M4X5 1.18 – 1.57 N·m Bushing supporter assy. assembly 1. Attach the lower shaft bushing 1 and the bushing presser B 2 to the bushing supporter assy 3 using the 3 screws 1.

  • Page 142: Feed Adjuster Assembly Attachment

    Modules Feed module Feed adjuster assembly attachment 1. Attach the feed adjuster assy. 1, polyester slider 2 and spring to the bushing supporter assy. 3. *Key point • Attach spring to the feed adjuster assy. 2 starting with the side having the smaller spring diameter. 2.

  • Page 143: Assembling The Feed Arm Assy

    Modules Feed module Assembling the feed arm assy 1. Attach the feed arm B assy 1 to the feed supporting plate assy 2, and attach the retaining ring E2. 2. Lubricate the feed supporting plate assy 2 shaft with 1 – 2 drops of FBK OIL RO 100.

  • Page 144: Feed Arm Assembly Attachment

    Modules Feed module Feed arm assembly attachment 1. Insert the feed arm assembly 1 from the bottom. *Key point • Insert the feed rectangular side shaft 3 of the feed arm B 2 into the feed adjuster 4 on the top side. 2.

  • Page 145: Shaft Stopper Plate Attachment

    Modules Feed module Shaft stopper plate attachment 1. Attach the shaft support plate 1 to the base plate with the screw 1. *Key point • Engage the positioning tab on the shaft support plate 1 with the positioning hole on the base plate. Torque Screw, Bind ·...

  • Page 146: Lower Shaft B Assy. Attachment

    Modules Feed module Lower shaft B assy. attachment 1. Attach the lower shaft B assy 1 to the feed base 2. 2. Attach the bushing supporter A 3 to the feed base 2. 3. Attach the bushing presser A 4 using the 2 screws 1. 4.

  • Page 147: Supporting Plate Spring Attachment

    Modules Feed module Supporting plate spring attachment 1. Attach the spring to the feed supporting plate assy 1 and the feed arm B assy 2. 21.6 SPRING XC2524*** Grease applications 1. Apply a small amount of EPNOC AP(N)0 to the vertical rod seat 1 on the vertical lever, the lower shaft horizontal feed cam surface 2 and the vertical feed cam surface 3.

  • Page 148: Vertical Adjusting Screw Attachment

    Modules Feed module Vertical adjusting screw attachment Upper surface meets. 1. Attach the M5 nut 1 to the vertical adjusting screw 2. *Key point • Tighten the M5 nut 1 until the M5 nut 1 and the upper surface of the vertical adjusting screw 2 meet. 2.

  • Page 149: Feed Bar Spring Attachment

    Modules Feed module Feed bar spring attachment 1. Attach the spring to the feed bar 1 and vertical feed shaft 2. *Key point • Align the vertical rod 3 with the seat of the vertical lever 4. 22.8 SPRING XC2547*** A hook form is a Left-right object.

  • Page 150: Inner Rotary Hook Bracket Assy. Attachment

    Modules Feed module Inner rotary hook bracket assy. attachment 1. Align the inner rotary hook bracket assy 1 with the stopper plate block, and hand start the screw 1 (Fully tighten after 4 - 28"Inner rotary hook bracket position adjustment.") Torque Screw, Bind M2.6X3...

  • Page 151: Fpm Holder Assy. Attachment

    Modules Feed module FPM holder assy. attachment 1. Turn the F pulse motor gear 1 counterclockwise until the stopper 2 on it touches the FPM holder assy shaft. 3. 2. Set the feed adjuster assy 4 to the position in the figure to the right. 3.

  • Page 152: F Gear Teeth Alignment

    Modules Feed module F gear teeth alignment 1. Apply a small amount of EPNOC AP(N)0 to the feed adjuster assy F gear 2. Turn the F pulse motor gear 2 clockwise until the stopper 3 on it touches the bushing supporter assy shaft 4. 3.

  • Page 153: Spring Attachment (For Fpm Holder Assy.)

    Modules Feed module Spring attachment (for FPM holder assy.) 1. Attach the spring to the feed base 1 and FPM holder assy 2. 19.8 SPRING XC2538*** Needle plate A ASSY assembly 1. Attach the F gear stopper plate 1 to the rear of the needle plate A 2 with the screw 1.

  • Page 154: Needle Plate A Assy. Attachment

    Modules Feed module Needle plate A assy. attachment 1. Attach the needle plate A 1 using the 2 screws 1. Torque Screw 1.18 – 1.57 N·m 3 - 75...

  • Page 155: Thread Cutter Module

    Modules Thread cutter module breakout diagram 3 - 76...

  • Page 156: Thread Cutter Module

    Modules Thread cutter module C pulse motor attachment 1. Attach the C pulse motor (ZPMM35SP-9N) 1 to the motor holder assy 2 using the 2 screws 1. *Key point • Attach the band 3. 2. Lubricate the C pulse motor 1 bearing with 1 – 2 drops of turbine oil # 100.

  • Page 157: Assembling The Thread Cutter Lever Assy

    Modules Thread cutter module Assembling the thread cutter lever assy 1. Attach the thread cutter lever gear 1 to the thread cutter lever 2 using the screw 1. Torque Screw, Pan (S/P washer) M3X6DA 0.78 – 1.18 N·m Thread cutter lever assy. attachment 1.

  • Page 158: Assembling The Thread Hook Assy

    Modules Thread cutter module Assembling the thread hook assy 1. Attach the thread hook assembly 1 to the spacer 2. 2. Attach the washer 3, polyester slider 4 to pin A 5, and then attach the retaining ring (E4). Retaining ring E4 Cutter holder assembly attachment 1.

  • Page 159: Sensor Holder Attachment

    Modules Thread cutter module Sensor holder attachment 1. Attach the sensor holder 1 with the 2 screws 1. Torque Screw, Pan (S/P washer) M3X6DA 0.78 – 1.18 N·m Thread cutter check 1. Pull the thread hook assy 1 from the thread cutter frame assy. 2.

  • Page 160: Thread Cutter Frame Assembly Attachment

    Modules Thread cutter module Thread cutter frame assembly attachment 1. Attach the polyester slider 1 to thread hook pin A 2. 2. Attach the wave-shape spring washer 3 to the thread cutter lever shaft 4. 3. Attach the thread cutter frame assembly 5 and the 2 collars 6 to the motor holder assembly 7 with the 2 screws 1.
  • Page 161 3 - 82...

  • Page 162: Adjustment

    Adjustment Inspection Needle curvature........4 - 2 Tip damage to needle ......4 - 3 Test Mode Starting test mode........4 - 4 Adjustment (Main Unit) Timing belt tension adjustment ....4 - 6 Motor belt tension adjustment....4 - 7 Needle bar rise adjustment .....

  • Page 163: Needle Curvature

    Inspection Needle curvature 1. Check to be sure that there is no curvature in the needle on a level block (horizontal block). The gap with the block should be even. 4 - 2...

  • Page 164: Tip Damage To Needle

    Inspection Tip damage to needle 1. Touch the tip of the needle to your finger, and check to be sure it does not catch. 4 - 3...

  • Page 165: Starting Test Mode

    Test Mode Starting test mode • With the front cover in place Press while turning the power on; the buzzer will sound four times, and test mode will start. • With the front cover in place Press SW1 and SW3 on the main PCB assy. while turning the power on; the buzzer will sound four times, and test mode will start.

  • Page 166: Test Mode

    Test Mode Test Modes (When changing modes, turn the power off, and restart the test mode) Mode Mode selection button Z (zigzag) F (feed) Operating speed operations operations 3 point needle With front cover Switches left base Any speed may be Press twice, select drop...

  • Page 167: Timing Belt Tension Adjustment

    Adjustment (Main Unit) Timing belt tension adjustment 1. Loosen the pan (S/P washer) M4X10 screw on the tension pulley assembly. 2. With a force of 1.96 N (200 g) pushing on the center of the belt, adjust the tension pulley assembly position for a deflection of 4 –...

  • Page 168: Motor Belt Tension Adjustment

    Adjustment (Main Unit) Motor belt tension adjustment 1. Loosen the upset 4 x 12 DB (two) in the motor holder. 2. With a force of 0.98 N (100 g) pushing on the center of the belt, adjust the motor pulley position for a deflection of 4 –...

  • Page 169: Needle Bar Rise Adjustment

    Adjustment (Main Unit) Needle bar rise adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts). *See (4 - 4 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 170: Needle Bar Height Adjustment

    Adjustment (Main Unit) Needle bar height adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts). *See (4 - 4 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 171: Three Point Needle Drop Adjustment

    Adjustment (Main Unit) Three point needle drop adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 4 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 172: Needle Interference Left/Right Adjustment

    Adjustment (Main Unit) Needle interference left/right adjustment 1. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 2. Loosen the screw (3X10). 3. Adjust the needle holder shaft block to the left or right so that the left base line / right base line needle drop is uniform forward and back with respect to the needle plate A hole.

  • Page 173: Clearance Between The Needle And The Rotary Hook Point Adjustment

    Adjustment (Main Unit) Clearance between the needle and the rotary hook point adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 4 "Test Mode") for starting test mode with the front cover in place.

  • Page 174: Presser Bar Height And Parallel Adjustment

    Adjustment (Main Unit) Presser bar height and parallel adjustment 1. Raise the presser foot lifter. 2. Turn the pulley so that the feed dog drops below needle plate A. 3. Loosen the set screw (CP) M5X10 in the presser bar clamp assy. 4.

  • Page 175: Fine Tension Adjustment

    Adjustment (Main Unit) Fine tension adjustment 1. Raise the presser foot lifter. 2. Pass Schappe Spun Sewing Thread #60 through the thread guide => tension plate. 3. Lower the presser foot lifter. 4. Pull the thread with a tension gauge, and adjust the power lock 2x3 so that it is 0.08 – 0.11 N (8 – 11 g). XA9153001 Tension gauge 30 (0.3 N) 4 - 14...

  • Page 176: Upper Thread Tension Adjustment

    Adjustment (Main Unit) Upper thread tension adjustment 1. Raise the presser foot lifter. 2. Turn the power on, and check that the AT pulse motor returns to its home position. 3. Turn the power off. 4. Pass the Schappe Spun Sewing Thread #60 through the thread guide, tension plate, tension disk, and brake plate assembly in this order.

  • Page 177: Inner Rotary Hook (Lower Thread) Tension Adjustment

    Adjustment (Main Unit) Inner rotary hook (lower thread) tension adjustment 1. Set a bobbin (wound with Schappe Spun Sewing Thread thread #60) in the inner rotary hook. 2. Pull the thread with a tension gauge, and adjust the spring adjusting screw so that it is 0.1 – 0.12 N (10 – 12 g). XA9153001 Tension gauge 30 (0.3 N) 4 - 16...

  • Page 178: Feed Adjustment

    Adjustment (Main Unit) Feed adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 4 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 179: Bobbin Winder (Uneven Bobbin Winding And Bobbin Winding Amounts) Adjustment

    Bobbin winder (uneven bobbin winding and bobbin Adjustment (Main Unit) winding amounts) adjustment 1. Move the bobbin winder guide assembly up and down and adjust uneven bobbin winding. 2. Turn the bobbin presser left and right, and adjust the winding quantity. *Key point •...

  • Page 180: Bh Lever Switch Position Adjustment

    Adjustment (Main Unit) BH lever switch position adjustment 1. Raise the presser foot lifter. 2. Set the BH presser two pitches smaller than the maximum length. 3. Attach the BH presser. 4. Lower the presser foot lifter. 5. Lower the BH lever, and set to the BH presser. 6.

  • Page 181: Forward And Back Adjustment Of Needle And Presser

    Adjustment (Main Unit) Forward and back adjustment of needle and presser. 1. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 2. Loosen the locknut. 3. Adjust the needle tip to the front/back center position of the needle hole using the set screw (socket (CP) M4X12). 4.

  • Page 182: Knee Lifter Adjustment

    Adjustment (Main Unit) Knee lifter adjustment 1. Lower the presser foot lifter. 2. Loosen the adjustment screws (two). 3. With a load of 5N (500 g) applied to the lifter, adjust the lifter and presser feed holder space. *Key point •...

  • Page 183: Side Feed Line Adjustment

    Adjustment (Main Unit) Side feed line adjustment 1. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 2. After pressing and selecting , press , and after selecting "FORWARD AND REVERSE FEED," press again until the needle moves to the left (base line) position and select "Feed line adjustment mode." Material drift correction value Left and right length correction value 3.

  • Page 184: One-Point Pattern Adjustment

    Adjustment (Main Unit) One-point pattern adjustment 1. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 2. After pressing and selecting , press , and select "PATTERN ADJUSTMENT." F feed correction value S feed correction value 3.

  • Page 185: Left And Right Feed Dog Position Adjustment

    Adjustment (Main Unit) Left and right feed dog position adjustment 1. Perform "4 - 26 Front/back, left/right position of feed dog adjustment" 2. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 3. After pressing and selecting , press , and select "FEED DOG POSITION."...

  • Page 186: Release Adjustment

    Adjustment (Main Unit) Release adjustment 1. Remove the face plate. 2. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 3. After pressing and selecting , press , and select "RELEASE." 4. Adjust the release adjuster up and down so that the moving part of the needle bar holder assy. does not come into contact with the release guide plate.

  • Page 187: Front/Back, Left/Right Position Of Feed Dog Adjustment

    Adjustment (Modules) Front/back, left/right position of feed dog adjustment 1. Remove the M4 screws (two), and remove needle plate A from the feed base. 2. Align the feed adjuster assy. gear and F pulse motor gear match marks (feed in 0 mm position). Match mark 3.

  • Page 188: Feed Dog Height Adjustment

    Feed dog height adjustment Adjustment (Modules) 1. Turn lower shaft B, and bring the feed dog to its highest position (D cut of the lower shaft B facing up). 2. Loosen the M5 nut. 3. Adjust the feed dog height so that it is 0.9 – 1.1 mm from the upper surface of needle plate A by the amount the vertical adjuster screw assembly is screwed in.

  • Page 189: Inner Rotary Hook Bracket Position Adjustment

    Adjustment (Modules) Inner rotary hook bracket position adjustment 1. Set the inner rotary hook in the outer rotary hook. 2. Loosen the screw (bind 3x8) securing the inner rotary hook bracket assy. 3. Adjust the inner rotary hook bracket assy. attachment position so that contact between the inner rotary bracket assy.

  • Page 190: Adjust The Needle Thread Block

    Adjust the needle thread block Adjustment (Modules) 1. Attach a needle. 2. Turn the unit shaft, and position the needle bar at its highest point (position where the D cut of the unit axis faces forward). 3. Loosen the set screw (socket FT 4 x 4). 4.
  • Page 191 4 - 30...

  • Page 192: Failure Investigation For Electronic Parts

    Failure Investigation for Electronic Parts * Perform resistance measurements after turning off the power, and detaching the connectors to be measured from the PCB. Error message list ............5 - 2 Power does not come on..........5 - 3 Pulse motors do not return to starting point ..... 5 - 4 Pattern cannot be selected..........
  • Page 193 Failure Investigation for Electronic Parts Error message list Error display Cause (5 - 20) Abnormal rotation in main motor. Key pressed continually with power ON (5 - 21) (operation system SW). (5 - 22) Key pressed continually with power ON (operation panel SW).
  • Page 194 Failure Investigation for Electronic Parts Power does not come on When the power is turned ON, the buzzer does not sound With the power cord plugged into an outlet, is the voltage between pins 1 and Replace inlet assy. 2 on the inlet assy. connector 120 V AC? Are the voltages between pins 3 &...
  • Page 195 Failure Investigation for Electronic Parts Pulse motors do not return to starting point When the power is turned ON, the pulse motors do not return to the starting point. • Needle up Z pulse motor return to starting point • Needle down F pulse motor and S pulse motor returns to starting point •...

  • Page 196: Pattern Cannot Be Selected

    Failure Investigation for Electronic Parts Pattern cannot be selected Pattern cannot be selected • Adjust the assembly of SS-VR F2 PCB assy. and the operation U22 PCB assy. Are switches on the SS-VR F2 PCB assy. and the operation U22 PCB assy. •...

  • Page 197: Main Motor Does Not Turn

    Failure Investigation for Electronic Parts Main motor does not turn Main motor does not turn Adjust the assy. of upper shaft Does the pulley turn easily? Is the main motor connector correctly connected to CN1 of power supply Reconnect it correctly unit F? Is the main motor resistance 1.5 –...
  • Page 198 Failure Investigation for Electronic Parts Main motor does not turn From previous page Is the presser foot lifter shaft down? Lower the presser foot lifter. Is the presser switch resistance normal? Replace switch assy. • Presser switch resistance 1 Ω or less Switch pressed …...
  • Page 199 Failure Investigation for Electronic Parts Main motor rotation abnormal • Main motor rotational variance • Does not reach maximum speed • Speed cannot be adjusted When the speed control lever is moved with the power ON, does the Replace SS-VR F2 PCB assy. voltage between pins 2 &...

  • Page 200: Cannot Sew Pattern Well

    Failure Investigation for Electronic Parts Cannot sew pattern well Normal pattern is not generated With the power OFF, can you lightly Adjust the attachment of the move the needle bar left and right by needle-presser module hand? Is the resistance between pins 1 & 2 and pins 3 &...

  • Page 201: Cannot Sew Button Holes Well

    Failure Investigation for Electronic Parts Cannot sew button holes well Cannot sew button holes well Is the correct presser being used? Change to correct presser Is the resistance between BH lever • Adjust BH lever switch connector pins 4 & 5 normal? •...

  • Page 202: Stitch Length And Zigzag Width Cannot Be Done By Manual Adjustment

    Stitch length and zigzag width cannot be Failure Investigation for Electronic Parts done by manual adjustment Stitch length and zigzag width cannot be done by manual adjustment. Does the LCD panel display change • Replace rubber keys when the manual key for stitch length and the manual key for zigzag width •...

  • Page 203: Problems With Vertical Needle Movement And Reverse Stitching

    Failure Investigation for Electronic Parts Problems with vertical needle movement and reverse stitching Problems with vertical needle movement and reverse stitching Are the resistance values for the Stop/start switch, reverse switch, raise needle switch and the thread Replace SS-VR F2 PCB assy. cut switch normal? •...

  • Page 204: Does Not Operate When The Foot Controller Is Used

    Failure Investigation for Electronic Parts Does not operate when the foot controller is used Does not operate when the foot controller is used. Is the resistance between the assy. pin jack F connector pins 2 & 3 normal? Replace assy. pin jack F •...

  • Page 205: Thread Tensioning Does Not Go Well

    Failure Investigation for Electronic Parts Thread tensioning does not go well Thread tensioning is not right Is the thread guide path correct? Set thread correctly Set the lower thread correctly Is the lower thread placement correct? Is the material, thread and needle Use the correct combination combination correct? Is the tension right?

  • Page 206: Thread Cutter Does Not Work Normally

    Failure Investigation for Electronic Parts Thread cutter does not work normally Thread cutter does not operate normally Adjust the assembly of the Do the thread hook assy. and lever thread cutter module gear move easily? Is the resistance between the 1 & 2 Replace C pulse motor pins and 3 &...

  • Page 207: Lcd Display Is Not Normal

    Failure Investigation for Electronic Parts LCD display is not normal No LCD display Are the LCD module and the Connect the LCD module and operation U22 PCB assy. properly the operation U22 PCB assy. connected? properly. Are the operation U22 PCB assy. and main Connect the operation U22 NF3D PCB assy.

  • Page 208: Lcd Light Does Not Come On

    Failure Investigation for Electronic Parts LCD light does not come on LCD light does not come on Are the single light guide assy. Properly connect the single backlight leads and operation U22 light guide assy. backlight leads PCB assy. properly connected? to the operation U22 PCB assy.

  • Page 209: Bobbin Winding Cannot Be Done

    Failure Investigation for Electronic Parts Bobbin winding cannot be done Bobbin winding cannot be done. Adjust the bobbin winder Is the bobbin winder mechanism mechanism for correct assembled and attached correctly? assembly and attachment Is the resistance between the bobbin winder assy.

  • Page 210: The Lamp At Hand Does Not Have Light

    Failure Investigation for Electronic Parts The lamp at hand does not have light The work area lamp does not light Reconnect the main NF3D PCB Are the main NF3D PCB assy. and assy. and PCB Unit LED lamp PCB Unit LED lamp FL correctly FL correctly connected? Reconnect the SS-VR F2 PCB...

  • Page 211: Error Is Displayed

    Failure Investigation for Electronic Parts Error is displayed "F01" is displayed After replaceing power supply unit F, start test mode and select test mode "11". Next, press the BK key. "F01" Error mode is canceled again. error mode is canceled. When the power is once turned off and is switched on again, is it displayed as "F01"?
  • Page 212 Failure Investigation for Electronic Parts Error is displayed "F02" is displayed Is one of the SS key, NP key, BK key Replace SS-VR F2 PCB assy. and CUT key stuck in a pressed down condition? Replace main NF3D PCB assy. Release the switch that is stuck 5 - 21...
  • Page 213 Failure Investigation for Electronic Parts Error is displayed "F03" is displayed Is one of operation panel keys Replace operation U22 PCB assy. (Pattern selection key etc.) stuck in a pressed down condition? Replace main NF3D PCB assy. Release the switch that is stuck 5 - 22...
  • Page 214 Failure Investigation for Electronic Parts Error is displayed "F04" is displayed Are the foot controller jack assy. lead Replace the foot controller jack wires broken? assy. Correctly connect the foot Is the foot controller jack assy. correctly controller jack assy. to the connected to the main NF3D PCB main NF3D PCB assy.
  • Page 215 Failure Investigation for Electronic Parts Error is displayed The error message "F05" or "F06" is displayed on the screen. Is the NP F2 PCB assembly correctly Correctly connect the NP F2 connected to the main NF3D PCB PCB assy. to the main NF3D assy.
  • Page 216 Failure Investigation for Electronic Parts Error is displayed "F07" is displayed Is the SS-VR PCB assy. correctly Connect the SS-VR PCB assy. connected to the operation U22 PCB to CN1 on the operation U22 assy. (CN1)? PCB assy. correctly Is "F07" still displayed even when another SS-VR F2 PCB assy.
  • Page 217 Failure Investigation for Electronic Parts Error is displayed "F09" is displayed Replace the main NF3D PCB assy. 5 - 26...

  • Page 218: Special Instructions Of Wiring

    Special Instructions of Wiring Needle bar module wiring ......6 - 2 Thred cutter / rotary hook module wiring .6 - 4 Side feed mechanism wiring ....6 - 5 Main PCB assembly wiring ......6 - 6 Front cover assembly wiring ....6 - 8 6 - 1...

  • Page 219: Needle Bar Module Wiring

    Special Instructions of Wiring Needle bar module wiring 1. Wiring on left side of needle-presser module Secure the lead wires with a clip. Secure the lead wires with a band. Hang the lead wires over the two hooks. The lead wires should be positioned above the rib.
  • Page 220 Special Instructions of Wiring Needle bar module wiring 3. Wiring on right side of AT pulse motor assembly Secure the end of the tube with a band. 4. Wiring on back side of arm bed Pass the lead wires through the groove. Secure the lead wires with a clip.

  • Page 221: Thred Cutter / Rotary Hook Module Wiring

    Special Instructions of Wiring Thred cutter / rotary hook module wiring 1. Wiring on front side of thred cutter module Secure the wires with a band, so that turn the connected section of the band inside. 2. Wiring on front side of rotary hook module 6 - 4...

  • Page 222: Side Feed Mechanism Wiring

    Special Instructions of Wiring Side feed mechanism wiring 1. Wiring on front side of side feed mechanism assy. 6 - 5...

  • Page 223: Main Pcb Assembly Wiring

    Special Instructions of Wiring Main PCB assembly wiring 1. Wiring at top side of main PCB Pass the lead wires through the groove. 2. Wiring at upper section of main PCB 6 - 6...
  • Page 224 Special Instructions of Wiring Main PCB assembly wiring 3. Wiring at lower section of main PCB 6 - 7...

  • Page 225: Front Cover Assembly Wiring

    Special Instructions of Wiring Front cover assembly wiring 1. Wiring of LED lamp assembly 2. Wiring of operation PCB assembly 6 - 8...

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